1. NAME AND TITLE

RASC-2DPI: Two-Dimensional Removal Diffusion Code Reactor Shielding Design Code System.

2. CONTRIBUTORS

Kawasaki Heavy Industries, Ltd. and Power Reactor and Nuclear Fuel Development Corporation, through the OECD NEA Data Bank, Gif-sur-Yvette, France.

3. CODING LANGUAGE AND COMPUTER

FORTRAN IV; IBM 370.

4. NATURE OF PROBLEM SOLVED

RASC-2DPI is a two-dimensional removal-diffusion program taking into account the line of sight technique for the treatment of void zones.

5. METHOD OF SOLUTION

The finite difference expression is solved by iteration using accelerated successive line over-relaxation. The removal source is handled by Gaussian integration three times. Void zones are treated using the line of sight method on the assumption that the neutrons emitted into the void will have a cosine shaped directional distribution.

6. RESTRICTIONS OR LIMITATIONS

There are no restrictions except for computer size. The program is written for R-Z or X-Y geometry. Void geometries are limited to only straight, annular, or cylindrical ducts.

7. TYPICAL RUNNING TIME

No study has been made by RSIC of typical running times for RASC-2DPI.

8. COMPUTER HARDWARE REQUIREMENTS

The program is operable on the IBM 360/370 series and requires a minimum of 200 K bytes.

9. COMPUTER SOFTWARE REQUIREMENTS

A FORTRAN IV compiler and a standard IBM OS Version 21 operating system are required.

10. REFERENCES

I. Suzuki, "A User's Manual for RASC-2DPIA Two-Dimensional Removal-Diffusion Code," PNC N241 77-24 (August 30, 1977).

Y. Tanaka, I. Suzuki, M. Takemura, and T. Suzuki "Applicability of Two-Dimensional Shielding Code," JAPFNR-167 (August 1974).

Y. Tanaka, I. Suzuki, and N. Otani, "Evaluation of the Two-Dimensional Shielding Code for a Fast Reactor Shield Design and Its Application," JAPFNR-68 (March 1972).

11. CONTENTS OF CODE PACKAGE

Included are the referenced documents and one (1.2MB) DOS diskette which contains the source codes and sample problem input and output.

12. DATE OF ABSTRACT

December 1981.